Product Description

Application:  
The instrument is our new generation model with *2 single-chip and *4 bit A/D technology on the basis of years of experience of design and manufacture, which could carry on Res and IP survey at the same time. It features multiple functions, high accuracy, fast speed, high reliability and excellent expandability. Measured data of WDJD*4 can be processed by other multi-electrode resistivity software, which makes the interpretation more convenient. This Instrument is widely used in metal and non-metal mineral resources exploring, civil geophysical exploration, railway/bridge prospecting etc, also can be used in ground water detecting, dam foundation/flood-control dyke hidden danger locating etc hydrological, engineering, geothermal prospection.

Main Features:
Transmitting unit and receiving unit are of all-in-one design, portable and lightweight.
 
Super high-power, high anti-interference performance and precision: up to ***0w (***0v×6A) power, *8Vp-p voltage range ensures to get a good result in a area with high resistance.
 
Automatically achieving compensation of self-potential, drift and electrode polarization, up to ±*0V.
 
Receiving unit support transient over-voltage protection, transmitting unit supports over-voltage protection, over-current protection and AB open-circuit protection.
 
For general resistivity and IP survey function, 9 types of electrode arrays are available. Electrode distance (namely Program) can be ted or called. Geometric factor K can also be generated automatically or calculated manually.
     
For multi-electrode 2D resistivity imaging, up to *8 electrode arrays are available. It could scanning measure according to fixed section (including AMNB, ABMN, AMBN, AMN, MNB, A-MN-B, Sp M, Sp MN, charge M, charge MN) or continuous rolling scanning measure according to variable section (including A-M, A-MN, AB-M, AB-MN, MN-B, A-MN rectangle).
 
Program: the program can memorize **0 groups of electrode distances, avoiding repetitive . Or you just a program Id and step to call the corresponding electrode distances.
 
Earth resistance inspection: ground condition can be inspected at any time.
 
Mass data storage: Up to 1GB capacity (extended) enable store 5,**0,**0 groups measuring data (including current, voltage, SP, Ro, Ms, metal factor, TH, R, J).
 
All parameter and data are under power-failure protection; and thus data will not be lost even thought the system shuts down accidentally.
 
USB port enables it to transfer data to computer.

Technical specification:
Receiving
1.Voltage precision: ±*4V, ±0.4% ± 1LSB, *4 bit A/D
2.Input impedance: ≥*0MΩ
3.Apparent polarizability precision: ±1% ± 1LSB
4.SP compensation range: ±*0V
5.Current channel: 6 A, ±0.4% ± 1LSB, *4 bit A/D
6.Resolution: Voltage: 0.1 micro volt; Current: 0.2 micro ampere.
7.Suppression: ≥*0dB for *0Hz industrial frequency (common mode interference or differential mode interference).
 
Transmitting
1.Max transmitting power
For general Res/IP sounding, ***0W.
For multi-electrode Res imaging, ***5W, limited by WDZJ*4 switcher
For Res cable, ***0W
For IP cable, ***0W
2.Max voltage
For general Res/IP sounding, ±***0V (***0V peak to peak)
For multi-electrode Res imaging, **0V DC (limited by WDZJ*4 switcher)
3.Max current
For general Res/IP sounding, ±6A
For multi-electrode Res imaging, 2.5A DC (limited by WDZJ*4 switcher
3.Pulse width: 1~*0s, duty ratio 1:1
 
Others
1.Display: **0 × **0 dot matrix LCD
2.Storage: ≤1GB
3.Working temperature: **0°C~**0°C, *5 %RH
4.Storage temperature: **0°C~**0°C
5.Instrument power: internal *2V 9Ah rechargeable battery , lasts for *0 hours (or *2V external power supply)
6.Weight: ≤ 4.4 Kg
7.Dimension (L×W×H): **0mm X **6mm X **5mm